/*
 * Copyright 2002-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.aop.framework.autoproxy;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.lang.Nullable;

/**
 * <p>
 *     InfrastructureAdvisorAutoProxyCreator
 *  功能：这是一个基础级别的自动代理创建器，主要用于内部基础设施Bean的代理创建。
 * 	特点：
 * 		主要用于Spring框架内部，处理一些特定于Spring基础设施的Advice或Advisor。
 * 		不直接面向用户配置或使用，更多的是作为一个底层的支持组件。
 * 		它可以识别并应用那些标记为基础设施类的Advisors。
 *
 * </p>
 * Auto-proxy creator that considers infrastructure Advisor beans only,
 * ignoring any application-defined Advisors.
 * <br> 基础设施 顾问 bean代理创建器，忽略 应用程序自定义的 顾问。
 *
 * @author Juergen Hoeller
 * @since 2.0.7
 */
@SuppressWarnings("serial")
public class InfrastructureAdvisorAutoProxyCreator extends AbstractAdvisorAutoProxyCreator {

	@Nullable
	private ConfigurableListableBeanFactory beanFactory;


	@Override
	protected void initBeanFactory(ConfigurableListableBeanFactory beanFactory) {
		super.initBeanFactory(beanFactory);
		this.beanFactory = beanFactory;
	}

	@Override
	protected boolean isEligibleAdvisorBean(String beanName) {
		return (this.beanFactory != null && this.beanFactory.containsBeanDefinition(beanName) &&
				this.beanFactory.getBeanDefinition(beanName).getRole() == BeanDefinition.ROLE_INFRASTRUCTURE);
	}

}
